Influence of low-molecular weight glutenin subunits on wheat kernel elasticity and sedimentation volume
Figueroa, J. D. C. | Peña, R. J. | Rayas-Duarte, P. | Khan, K.
The effect of low molecular weight (LMW) glutenin subunits (GS) in presence of high molecular weight (HMW)-GS has over SDS sedimentation volume (SDSS) and kernel elasticity is presented. Twenty-six wheat lines having different origins and classified by SDS-PAGE into 14 different LMW-GS genotypic allelic groups were analyzed. When good HMW-GS background, i.e. Glu-1 1, 2*, 7 + 9 or 17 + 18 and 5 + 10 was associated with a number of allelic variants of <i>Glu-3</i> loci (LMW-GS), i.e. <i>Glu-A3 c</i> and <i>b; Glu-B3 g, h, d</i>, higher kernel modulus of elasticity and SDSS were generally present. However, when poor HMW-GS background was present, i.e. <i>Glu-1</i> null, 7 + 8, 2 + 12, a poor to medium modulus of elasticity and SDSS were generally found. <i>Glu-B3</i> j allelic group, which possesses the wheat-rye translocation showed a tendency to have low elastic modulus, high plastic work (WP) and low SDSS. The effects of good LMW-GS are enhanced by a good HMW-GS background, yielding higher kernel elasticity and SDSS.
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